Joule:

Define: A joule is a unit of energy. One joule is the force of one newton acting through a meter. Energy in joules equals 1/2mv². One joule equals 1kg * (m²/s²).

Units: (based or derived): J

Other topics:

1. Scalar

Sources http://www.physics.uci.edu/~silverma/units.html http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/energy/u5l1c.html